One of my hard drives is cooking..

[Neil Whitworth]

I recieved an email from my freeNAS system yesterday telling me that one of my HDD's had reached critical temperature ( I have this set to 38 deg C). After logging on and checking the temperatures on all 4 HDD's I noticed that one (ada0) was running 3 deg hotter that the rest (ada1-3 were 35 deg C)

My first thought was that this had something to do with servers position in the rack, and the switch imediatly above. I thought that the switch may have a hot spot on one side keeping the HDD just below that little bit hotter than the rest.

So last night I shut everything down, and moved the freeNAS server to a new position in the rack where it has free space above and below before restarting everything again.

Today I have been keeping an eye on all the temps, but I am still seeing ada0 is 2-3 deg C hotter that the rest (see hdd-temps.txt - samples taken at random over approx 6 hrs)

Later I will shut everything off again, and check the HDD trays, case fans/vents etc for blockages.

Anyone got any more ideas for what else to check?

Hardware:-

12U open rack containing (TOP -> BOTTOM)http://www.ebuyer.com/290816-starte...equipment-open-frame-rack-cabinet-4postrack12old 100Mb switch (Powered off)
ZyXEL GS1910-24 Gigabit switch
empty
empty
Supermicro 5017C-MTF (FreeNAS server)
empty
..
empty
Eaton 5P 850i UPS

All this is in the roof space which is warmer than the rest of the house.
NO air conditioning
System is idle throughout the day

 

[cyberjock]

You might want to check the fans in the case too.

Also in the BIOS you can change the fan speed from "power saving" to "optimized".